DURÁN infrared refrigerant gas detector direx rs485 ip65 with relay, range 0-2000 ppm, with thermal compensation controls, linearisation and memory for calibration parameters. plastic enclosure, rs485 addressable, 4-wire connection, compatible with durgas control panels, in parallel up to 16 detectors on the same loop, local alarm relay output. protects joints, elbows, gas inlets/outlets, valves, welds, compressors,...